<template>
	<div :class="{'hidden':hidden}" class="pagination-container">
		<el-pagination
			:background="background"
			:current-page.sync="currentPage"
			:page-size.sync="pageSize"
			:layout="layout"
			:page-sizes="pageSizes"
			:pager-count="pagerCount"
			:total="total"
			v-bind="$attrs"
			@size-change="handleSizeChange"
			@current-change="handleCurrentChange"
		/>
	</div>
</template>

<style scoped>
  .pagination-container {
	padding: 32px 16px;
	background: #fff;
  }
  .pagination-container.hidden {
	display: none;
  }
  </style>

<script>
import { scrollTo } from "@/utils/scroll-to";

export default {
	name: "pagination",
	props: {
	  total: {
			required: true,
			type: Number
	  },
	  page: {
			type: Number,
			default: 1
	  },
	  limit: {
			type: Number,
			default: 20
	  },
	  pageSizes: {
			type: Array,
			default() {
		  return [10, 20, 30, 50];
			}
	  },
	  // 移动端页码按钮的数量端默认值5
	  pagerCount: {
			type: Number,
			default: document.body.clientWidth < 992 ? 5 : 7
	  },
	  layout: {
			type: String,
			default: "total, sizes, prev, pager, next, jumper"
	  },
	  background: {
			type: Boolean,
			default: true
	  },
	  autoScroll: {
			type: Boolean,
			default: true
	  },
	  hidden: {
			type: Boolean,
			default: false
	  }
	},
	data() {
	  return {
	  };
	},
	computed: {
	  currentPage: {
			get() {
		  return this.page;
			},
			set(val) {
		  this.$emit("update:page", val);
			}
	  },
	  pageSize: {
			get() {
		  return this.limit;
			},
			set(val) {
		  this.$emit("update:limit", val);
			}
	  }
	},
	methods: {
	  handleSizeChange(val) {
			if (this.currentPage * val > this.total) {
		  this.currentPage = 1;
			}
			this.$emit("pagination", { page: this.currentPage, limit: val });
			if (this.autoScroll) {
		  scrollTo(0, 800);
			}
	  },
	  handleCurrentChange(val) {
			this.$emit("pagination", { page: val, limit: this.pageSize });
			if (this.autoScroll) {
		  scrollTo(0, 800);
			}
	  }
	}
};
</script>